body {
    font-family: "Helvetica", "Arial", serif;
    color: #333333;
    background-color: #f5eec6;
    margin-left: 10%;
}

h1 {
    color: #222222;
    background-color: transparent;
}

a {
    color: #c60;
    background-color: transparent;
    font-weight: bold;
    text-decoration: none;
}

ul {
    padding: 0;
}

li {
    float: left;
    padding: 2em;
    list-style: none;
}
#imagegallery {
    list-style: none;
    /* 设置列表首行的样式 */
}
#imagegallery li {
    display: inline;
    /* 显示li在一行 */
}
#imagegallery li a img {
    border: 0;
    width: 150px;
}
/* placeholder转移到js*/
#placeholder {
    width: 700px;
    margin-left: 1em;
}